ES2205716T3 - Safety cartridge for thermostatic mitigator. - Google Patents

Safety cartridge for thermostatic mitigator.

Info

Publication number
ES2205716T3
ES2205716T3 ES99400240T ES99400240T ES2205716T3 ES 2205716 T3 ES2205716 T3 ES 2205716T3 ES 99400240 T ES99400240 T ES 99400240T ES 99400240 T ES99400240 T ES 99400240T ES 2205716 T3 ES2205716 T3 ES 2205716T3
Authority
ES
Spain
Prior art keywords
thermostatic
seat
capsule
envelope
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES99400240T
Other languages
Spanish (es)
Inventor
Jean Chamot
Christian Mace
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vernet SA
Original Assignee
Vernet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR9801639 priority Critical
Priority to FR9801639A priority patent/FR2774740B1/en
Application filed by Vernet SA filed Critical Vernet SA
Application granted granted Critical
Publication of ES2205716T3 publication Critical patent/ES2205716T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/01Control of temperature without auxiliary power
    • G05D23/13Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
    • G05D23/1306Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids
    • G05D23/132Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element
    • G05D23/134Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element measuring the temperature of mixed fluid
    • G05D23/1346Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element measuring the temperature of mixed fluid with manual temperature setting means

Abstract

THE INVENTION REFERS TO A CARTRIDGE CONTAINING A THERMOSTATIC ELEMENT (4) THAT HAS A DISTRIBUTOR (3) EQUIPPED WITH TWO VALVES (35, 36) OF INTERRUPTION OF WATER CURRENTS RESPECTIVELY HOT AND COLD. A PART (47) OF THE THERMOSTATIC ELEMENT IS STAYED IN A PISTON (5) THAT PRESENTS THE SAME A GUIDED PART IN SLIDING BY MEANS (52, 8, 63) OF REVERSIBLY WORKING GUIDE, ADAPTED TO GUIDE THE PISTON WHILE THE VALVE (35) OF INTERRUPTION OF HOT WATER CURRENT IS NOT IN CONTACT WITH ITS SEAT (21), TO SUPPRESS THE GUIDE WHEN THE VALVE IS APPLIED TO THE SEAT, TO ALLOW THEN A DESALINATION OF THE PISTON (5), OF THE THERMOSTATIC ELEMENT (4) AND OF THE DISTRIBUTOR (3) SO THAT THIS VALVE (35) CAN BE HERMETICALLY APPLIED AGAINST YOUR SEAT (21), AND TO ESTABLISH THE GUIDANCE WHEN THE VALVE IS REMOVED FROM YOUR SEAT.

Description

Safety cartridge for mitigator thermostatic.
The invention relates to mitigators intended to "mitigate" or mix two streams of fluid that enter at different temperatures, in order to constitute a single fluid stream leaving at a constant, adjustable temperature regardless of pressures and temperatures respective of the two incoming fluid streams, and the flow rate of the fluid that comes out, within a certain range of pressures and of flow rates.
It refers more particularly to the constitution of the capsule that internally equips such mitigators, mainly as regards the cursor drive mobile of regulation that carries out the dosing of the currents of incoming fluid depending on the desired temperature for the fluid outgoing.
Indeed, in known mitigators particularly for sanitary facilities (cabins of shower, bathtubs with or without shower, etc.), in order to obtain a precise regulation that is as stable as possible, the path of the regulation cursor rarely exceeds one millimeter for a regulation temperature (classic) from 20 to 60ºC). It results from it that a variation of 1ºC is generated by a travel of 0.025 mm, which allows great accuracy and good fidelity of the placement in position within the comfort zone ranging from 35 to 40 ° C (corresponding to a path of 0.125 mm). However, the desired accuracy and fidelity, as well as good stability of temperature is only achieved by a rigorous guide of the cursor.
In addition, to meet safety standards, it is necessary that the interruption of the cold water supply imply a power interruption in hot water, tolerating an extremely small leak. The cursor must therefore then be able to go freely to sit on your seat.
The guide needed to get accuracy, fidelity and stability, which constitutes an opposition to free placement in position of the cursor on your seat, therefore presents a inconvenience in terms of operational safety of the mitigator.
In addition, the power interruption of hot water must be extremely fast; the speed of reaction assembly depends on part of the elements thermostatics used in these types of applications, usually of wax, which is unbeatable, and on the other hand, of the mixture intimate of incoming water currents, which is equally; the invention aims to achieve a reaction time of less than one second when the interruption of the water supply occurs cold
On the other hand, it is necessary to be able to mount the capsule easily and quickly inside the body of the mitigator, which This is not always the case in known mitigators.
The invention thus has mainly as object to avoid the inconveniences of known mitigators and create a mitigator that easily meets safety standards, that is easy and quick to manufacture, assemble and repair, and that It is within a moderate cost.
To this end, the invention relates to a thermostatic mitigator capsule, comprising a wrapper hollow exterior that has one or more openings that constitute a first inlet for a first fluid stream, as well as one or more openings that constitute a second entry for a second fluid stream and crossed by an internal channel that flows through a hole that constitutes an outlet for a fluid mitigated resulting from the mixture of fluid streams, a thermostatic expandable element, two valve seats clapper next to each entry, a cursor that has two flap valves that cooperate each with one of the seats to isolate or communicate each input and output, set to a part of the mobile thermostatic element depending on its temperature, a plunger in which an area of the element is housed thermostatic which, for a given regulation, is fixed, while the immediate seat of the first entry is not in contact with its valve, and an elastic organ that requests the piston in the sense of the approach of this valve with respect to its seat, capsule characterized in that the plunger has less a sliding guided zone by guide means reversibly releasable, adapted for your guidance while the Immediate seat of the first entry is not in contact with your flap valve, remove the guide when the valve is supported on the seat to then allow misalignment of the piston, of the thermostatic element and of the cursor, so that it apply the valve tightly against this seat, and of Reset the guide when the valve leaves your seat.
According to a feature of the invention, a zone of the thermostatic element is surrounded by an organ of creation of turbulence, and preferably, the body of creation of turbulence is a ring arranged in the exit zone for the mitigated fluid, which presents a passing step that leaves a generally annular space between the inner surface of your wall and thermostatic element, presenting this step through a flare towards the outside of the capsule, extending longitudinally some grooves and existing a cavity at its end facing the inside of the capsule.
According to another feature of the invention, the releasable guide means reversibly comprise a zone of end of the plunger that penetrates a hole drilled in a partition that extends transversely to the longitudinal axis of the wrap, a guide washer lined around this area of end, and a seat provided for the guide washer in the partition.
According to another characteristic of the invention, the thermostatic element comprises a container for a mass of dilatable matter, which presents planes or depressions and some reliefs, which determine, in cross section, a shape that It has at least two lobes.
Also according to a characteristic of the invention, the envelope contour has two planes, and the mitigator comprises a body that has a groove in which it insert a staple that has substantially rectilinear branches that they extend to one side and another of the envelope in front of these planes, also presenting the contour of the envelope a groove that allows the insertion of a tool for extracting the staple.
Other features and advantages will come off of the invention of the following description of embodiments of the invention given by way of non-limiting examples, and illustrated by the attached drawings, in which:
- Figure 1 is a longitudinal section of a thermostatic capsule according to the invention,
- Figures 2A and 2B are sections cross-sections of a part that forms a wax container of two embodiments of a thermostatic element particularly well adapted to enter the constitution of a capsule according to the invention,
- Figure 3 is an external view of the element thermostatic whose cross section is represented in the figure 2B, and
- Figure 4 shows, in cross section to the line level IV-IV in figure 1, a variant with respect to this figure 1, of the assembly form of a capsule according to the invention in a mitigator body.
As numerous known mitigator capsules, that of Figure 1 comprises an elongated hollow outer shell 1 externally presenting a general form of approximately revolution around a central geometric axis that extends longitudinally.
The envelope is pierced from part to part, to along this longitudinal axis, through an internal channel that presents also a roughly general form of revolution, centered on this axis.
The wall of the envelope 1 has at least two lateral openings 11, 12 that cross this wall radially from side to side to join the outer volume to the envelope in its internal channel, longitudinally offset; these openings can present the shape of two circular holes, or also extend in arc or arcs of circumference by the wall of the envelope 1; the wrapper can present for example two series of four openings 11, 12 in the form of circumference arcs, distributed regularly by its contour, these two series being separated in longitudinal direction of the envelope by a few millimeters up a few centimeters depending on the dimensions of the capsule.
One of the openings or series of openings 11, in the wall of the envelope constitutes a hot water inlet, and the other opening or series of openings 12 constitutes an entrance of cold water. These two tickets can be equipped each with a filter for example in the form of a flexible metal band stainless that has perforations located here in a throat of the envelope.
As certain known mitigator capsules, the capsule of figure 1 comprises a sleeve 2 fixed in the channel internal of the envelope 1 coaxially for example, remaining screwed into a threaded end portion thereof; this cuff it presents a step that crosses it, centered on the axis longitudinal envelope; its end housed in the wrap it is preferably at least slightly outgoing within the volume delimited by the extension towards the interior of the channel of the envelope, of the contour of the opening or series of openings 11 closest to the end of the envelope in which it is screwed on, which constitutes the hot water inlet; East end of the sleeve immediately to the openings 11 is made in the form of an annular seat 21 for a flap valve annul hot water flow regulation, as we will see continuation. Next to the end of sleeve 2 made under the shape of a seat, envelope 1 or an annular piece applied in this wrap has a support surface equally made in the form of an annular seat 13, which preferably remains or flush or slightly protruding within the delimited volume by the extension towards the interior of the channel of the envelope, of the contour of the other opening or series of openings 12, which constitute the cold water inlet; this immediate seat to the openings 12 is intended to receive a flap valve cancel for the regulation of the cold water flow.
The envelope 1 and sleeve 2 are mounted on airtight arrangement in the body of the mitigator by means of O-rings arranged in throats that extend along their periphery.
Always as in the known capsules, that of the Figure 1 comprises a cursor 3 mounted in arrangement longitudinally inside the envelope 1 between the two seats 21, 13. This cursor consists of two rings 31, 32 concentric communicated by radially extending ribs and longitudinally and that determine between each other steps 33 that extend longitudinally from one end of the cursor to the other. The outer ring 31 fits in the channel of the envelope and is sealed with it by means of an annular seal 34; its longitude it is generally superior to the separation between the two openings or the two series of openings 11, 12; the inner ring 32 is drawn and it is fixed around a part, approximately central, that we will designate next as "moving part" 41, of a thermostatic dilatable element 4 presenting a general shape outer elongated approximately revolution, which crosses the cursor 3 from part to part and extends beyond the two seats 21, 13; for this purpose, the mobile part 41 comprises for example a support surface and a threaded area of smaller diameter, and the ring 32 of cursor 3 is then supported against the surface of support by a nut coiled around the filleted area. Between the thermostatic element 4 and the internal surface of the cuff extends an annular space 22 that communicates the steps Longitudinal 33 of the cursor with the outside of the capsule. Both ends of the outer ring 31 of the cursor are made in the form of 35, 32 annular flap valves adapted to cooperate with the seat 21, 13 that is placed front to front, in such a way that the valves can be applied against the seats in order to prevent the flow of the corresponding water flow to the capsule outlet.
When a stream of water is sent heat an opening or a series of openings 11 of the wrap, and a stream of cold water to the other opening or series of openings 12, the two streams are mixed more or less intimately inside cursor 3 and sleeve 2, around of thermostatic element 4; the quantities of hot water and of cold water introduced is determined by the location of the cursor 3 between the two seats 21, 13, which defines the sections of the steps for both currents according to the valves being more or less close to their respective seat, and so it is with the water temperature called "mitigated" leaving the capsule around the mobile part 41 of the thermostatic element, through the hole through which the internal channel of the envelope.
However, in the known capsules, the part fixed 42 (or more exactly, normally fixed), of the element thermostatic, which is an end part of element 4 that is opposite the sleeve 2, beyond the water inlets hot and cold water, stays guided and centered in the channel of the envelope. They are, on the other hand, this guide and this focused that allow to obtain precision, fidelity and stability of the temperature regulation. Instead, as we have seen, is this also what causes the inconvenience in terms of security of operation, which is mentioned in the preamble of the request.
More exactly, in the known capsules, contrary to the case of the invention represented in figure 1, the fixed called part 42 of the thermostatic element is maintained always guided and centered on a piston housing mounted on sliding arrangement along the central geometric axis of the wrapped and rigorously guided by you throughout your entire travel; on the one hand, this plunger is subjected to the action of a first helical spring that drives it towards the seat corresponding to the hot water inlet to conduct the moving part 41 of the thermostatic element and the cursor towards its closing location of this inlet, and of a piston stop whose location is modifiable depending on the desired temperature for the outgoing mixture; on the other hand, the thermostatic element 4, in general a collar 43 of its mobile part next to the part on which cursor 3 is fixed, is subject to the action of a second spring less powerful than the first and that requests it in in the reverse direction, in order to keep its fixed end portion 42 in the piston housing.
So, in these known capsules, when the cursor 3 is in a chosen location to obtain a hot water-cold water dosage desired, the cold water flow decreases or is suddenly suppressed, it lengthens the thermostatic element 4 whose temperature rises, the part mobile 41 drag the cursor to its interrupt location of the hot water flow, that is, butt against the sleeve 2 (on the side of hot water), and if in spite of that, it continues increasing the temperature and the thermostatic element continues lengthening, the mobile part being locked, the part normally fixed 42 moves in the opposite direction of the direction in which it moved the moving part, dragging the plunger against the effort exerted by the first spring that requests it in the direction to the side of hot water, thus ensuring this first spring the function of over-run spring, until, when the temperature the thermostatic element returns to its position initial, while still being guided and centered at the level of its end normally fixed 42.
In the capsule according to the invention represented in Figure 1, the fixed part 42 of the thermostatic element it is also introduced in a housing of a piston 5 of over-race mounted on sliding arrangement length of the central axis of the envelope 1. Instead, the piston 5 and the fixed part 42 of the thermostatic element 4 are arranged to focus on the channel only in the course of current operation of the mitigator in order to preserve the desired accuracy, fidelity and stability of regulation, is say, as long as the thermostatic element does not extend beyond what is necessary so that cursor 3 can go to lean against the cuff 2 on the hot water side, but to be able to de-center in order that the seat contact 21-valve 35 can be perfect without obstruction if the thermostatic element continues its lengthening.
More exactly, according to the invention, of preference, the support made in the form of a seat 13 annular is directly molded in envelope 1, and is a sleeve 6 housed in the inner channel of the envelope which It contains the sliding piston 5, as well as the coil spring 7 which moves it towards the hot water inlet.
Also according to the invention, instead of the piston 5 is driven by this spring 7 towards a stop of Modifiable location depending on the desired temperature, is the location of the sleeve 6 the modifiable depending on the desired temperature To this end, the sleeve 6 is mounted on sliding arrangement and guided in translation along the channel internal of the envelope 1, and is divided into two chambers 61, 62 which they follow each other longitudinally and are separated by a partition 63 extending transversely to the longitudinal axis of the envelope and drilled by a central hole whose mission will be explained after.
It is in camera 61 located on the cursor side where the piston 5 and its tension spring 7 are housed; the tension spring is guided externally by the surface inner side of chamber 61 and internally in one of its ends along the periphery of a shoulder of partition 63 in which has drilled the central hole while its opposite end is supported against a support base, end, 51 (of cursor side) of piston 5, which is guided externally by the inner side surface of the chamber 61. The piston 5 comprises a body that extends from the base of lift 51 longitudinally in the direction of the end of the sleeve 6 opposite cursor 3 and running through the central hole of the transverse septum; the end zone 52 of the piston body opposite to the support base is guided in sliding of releasable or removable way reversibly by the fact of be surrounded by a guide washer 8 in support against the partition on its side opposite camera 61 on the cursor side, such as we will see later, as well as against a surface support zone outside of this end zone; the piston body part 5 attached to the support base 51 guides the tension spring 7 inwardly over a part of its length, and the area surrounded by a washer 8, of smaller diameter, is attached to this guide part of the spring by a stop surface against the partition; the plunger 5 is crossed longitudinally by a central channel that flows from the side of the support base 51 through a chamber by which extends the fixed part 42 of the thermostatic element and possibly an area of the mobile part thereof; the extreme, domed, for example hemispherical, of this fixed part, is leaning against an area of the plunger that forms the transition between this piston chamber and a narrowed part of its central channel; bottom 53 of this transition zone has a rounded shape for example in a spherical cap and flows into the chamber with a truncated conical shape; the circular contour of the lift base 51 also presents, in section, a bulged shape; the second spring 7 ', whose mission is to push the thermostatic element 4 in support against the rounded bottom 53 that forms the area seat transition of the central channel of the piston has here a form cylindrical general; does not act directly on the element thermostatic 4, but against a surface support surface inner of outer ring 31 of cursor 3.
The chamber 62 of the sleeve 6, separated from the preceded by partition 63 presents an internal filleting intended to cooperate with an external filleting of a body 91 of a screw 9 for regulating the desired temperature, whose head 92 it is located outside the capsule at the opposite end of the mitigated fluid outlet; this head 92 is ribbed to be able to join in rotation to a maneuver button (not shown) fixed to the same by a longitudinal central screw; a part of the body 91 of the adjustment screw 9, not threaded, joins the part filleted to the screw head; this part comprises an area adjusted in the inner channel of the envelope 1, being secured the tightness between the wall of the envelope and this area by substantially o-rings 93; the outer diameter of this area it is slightly higher than the screw head; the part no threaded screw body also includes, in the vicinity of the threaded part, a stop collar 94 against a surface of support of the internal channel of the envelope 1, and close to the head, outside the wrap when the collar is butt, a throat to receive a stop washer 95, such as a circular sealing spring, in order to prevent all translation of the screw 9. The adjustment screw 9 comprises a blind cylindrical chamber 96 extending longitudinally, coaxially to the inner channel of the envelope, leading to the front to piston 5; guide washer 8 is fixed by crimping around the end of the overdrive piston 5 and is profiled to be applied against a seat provided for that purpose in partition 63 between the two chambers 61, 62; this seat is conical and flared in the direction of the regulating screw 9, as well as the contour of the area of the washer 8 located front to front; So therefore, the washer 8 can be reversibly released from its seat to temporarily suppress the piston guide.
The guide in translation of the sleeve 6 along of the internal channel of the envelope 1 is ensured by the fact that the surfaces in front of these two pieces are equipped of grooves, in its area surrounding chamber 61 for the plunger 5.
Always according to the invention, the area of the ring outer 31 of the remaining cursor 3 adjusts inside the internal channel of the envelope and sealed by an approximately O-ring seal 34, it has a slightly bulged shape in longitudinal section outward; the same goes for a cuff zone 6 next to seat 13 immediately at the entrance to the cold water, of preference the central part of the vertex of the grooves 64, and it will be noted that sleeve 6, of a relatively length large, it does not fit in the inner channel of the envelope anymore that over an area 65 of short length, near the screw regulator 9; thus, cursor 3 can take a position in the which its longitudinal axis is slightly inclined in relation to the longitudinal axis of the central channel of the envelope 1 without its assembly in this stop being watertight, being minimal the risks of jam of sleeve 6, guided only in the vicinity of its extremes
The normal operation of the capsule is analogous to the known capsules, and to the various positions of the regulating screw 9 in a given regulation zone correspond to them as many support plunger locations 5 for the element thermostatic 4; for properly calculated capsules, these locations correspond to as many stability states of the total length of the thermostatic element, and thus, to others so many combinations between the states of partial closure of the Cold water and hot water inlets. Instead, if in a state stable or not, after an unexpected cut in the water supply cold, or a supercharge in hot water, the element thermostatic 4 lengthens, cursor 3 approaches seat 21 of the hot water side, and its corresponding flap valve 35 you can get to rest on this seat if the temperature rise of mixed water; if the temperature is such that the thermostatic element 4 continues to lengthen, the part normally fixed 42 of the latter moves in turn and rejects the piston 5 inside its sleeve 6, under the effort exerted by its traction coil spring 7, which causes the takeoff of the washer 8 supported by the plunger, of the partition 63 of the sleeve; thus, the plunger is no longer guided by its end normally fixed, and the cursor valve 35 can be applied tightly against your seat 21 and prevent the flow of all flow, even minimum, hot water, and so much more easily as the outer ring 31 of cursor 3 is domed, seat 53 of the piston 5 for the normally fixed end of the thermostatic element 4 is rounded, and the circular contour of the lift base 51 of the plunger is bulged, which allows misalignment, by example an inclination of the longitudinal geometric axes in particular of piston 5, thermostatic element 4 and cursor 3 in relation to the envelope 1. When the thermostatic element 4 retracts, the plunger 5 passes into its initial position by means of its traction spring 7 and washer 8 returns against its seat in partition 63, the new centering of the different ones being facilitated pieces by the rounded shapes already mentioned, and by the shape conical trunk of washer 8 and its seat; it resets Then the piston guide.
On the other hand, in order that while not bring a splash of hot water and a splash of cold water, the mixture very quickly as homogenously as possible, sleeve 2 of capsule outlet is provided with an organ 10 creating turbulence around the thermostatic element. This organ of creation of turbulence is constituted by a ring inserted in the end of the pass through the cuff farthest from the cursor 3, whereby the thermostatic element 4 goes outside the envelope; the passage through 101 of this ring 10 itself presents a flare 102 towards the outside of the envelope 1, and leave a generally annular space between the inner surface of your wall and thermostatic element 4; in addition to flare 102, this internal surface has splines 103 that extend longitudinally and are distributed regularly along its circumference; on the side of the ring facing inwards of the envelope, the inner surface of the ring flows through a Circular cavity 104 of smooth peripheral wall extending the bottom of the grooves.
Externally, the ring features a collar 105 of support against the outlet end wall of the sleeve 2, the which has four recesses 23 distributed angularly in 90 degrees; towards the outside of the envelope, the outer surface of ring 10 is cylindrical and smooth, and has a diameter slightly lower than the sleeve hole; inland of the envelope 1, its outer surface has ribs 106 of low height that decrease to its extreme; these are ribs and collar 105 of the ring which support the 7 'helical spring designed to keep the part normally fixed of the thermostatic element in support in the piston 5 and which for this purpose is pressed against a support area of the inner surface of the outer ring of the cursor.
Thanks to the particular shape of the surface internal of the outlet ring 10, the water leaving the capsule and surrounding the thermostatic element is animated by turbulence that quickly ensure good homogeneity of the mixture.
In general, it is advantageous that the water inlets are away from the outlet for the thermostatic element to take well its temperature evenly thanks to the turbulence created by ring 10, which favor the mixing of cold water and Hot water; however, it is also necessary to keep the possibility of generating an important flow, which leads to adopt a turbulence-flow commitment.
Given the importance of the homogeneity of the mixture, of the location of the element thermostatic in the flow of hot water-cold water, the determination of this location can be improved to the maximum by computer calculation It is thus possible to obtain a thermostatic element with a very short reaction time, and a correction of the mixture Extremely accurate, almost instantly.
In order that precisely the time of thermostatic element response be very short, this element it can, advantageously, present instead of the classical form, a particular shape such as those depicted in figures 2A, 2B and 3.
Classic thermostatic elements comprise a metal container 44 having a general cylindrical shape, one end of which, in the background, is closed and whose opposite end opens to form collar 43, as well as a cover 45 that it also has a general cylindrical shape with a channel central and a support base housed in the collar of the container, which is set around said base. The part cylindrical container 44 is filled with a mass of wax dilatable, and the base of support of the cover presents in its face that faces this wax mass, a housing for a flexible disc-shaped diaphragm that seals the channel center of the container side cover; inside of cover channel, a piston 47 is attached to the movements of the central area of the diaphragm, protruding more or minus the end of this piston opposite the diaphragm outside the cover depending on the volume occupied by the wax, and therefore of the temperature of the latter; there is a tubular bellows 46 of protection surrounding a part of the cover and the plunger, remaining its ends immobilized in throats practiced in the contour of these two pieces; this bellows, in the form of a flexible unrollable membrane, follow the plunger movements without elastic deformation.
How container 44 has a section cross straight circular, the central area of the wax mass is far away from the side surface of the container, and like wax It is a mediocre conductor of heat, fast variations of vessel wall temperature are transmitted with a sensitive delay to these remote areas, which is inconvenient as regards the operational safety of the capsule.
To avoid this inconvenience, preferably, inside the capsule according to the invention, the thermostatic element it has the essential difference that the contour of the container 44 it has two parallel planes 48, or in the circumferential direction a succession of depressions 48 'and reliefs, due for example to a pressure deformation, which determines in cross section rectum a lobed form that has at least two lobes 49 as in Figure 2A, and preferably, three lobes 49 as in the Figures 2B and 3, or eventually more.
Under these conditions, on the one hand, even the central area of the wax mass is close to the contour of the container 44, and on the other hand, the amount of wax, which is bad conductive heat, is reduced, so the time of Thermostatic element response is noticeably shortened.
In this case, the container 44 is made in First place with a circular straight section, it is filled after partially of wax, and then the collar of the container around the deck support base endowed with its vacuum diaphragm, so that it does not form No air bag in the container, and then subjected the vessel to the pressure deformation operation in order of creating the planes 48 or the depressions 48 'and the reliefs that determine the lobes 49 of the section of the container.
Although in the above detailed description, of the thermostatic elements, the plunger has been described as mobile with respect to the container, the cover, etc., in many known capsules and in the capsule according to the invention, it is the plunger the one that remains normally fixed while the other organs they are mobile inside the capsule, and it will be understood that mentioned movements are relative movements of the different parts of element 4.
On the other hand, like certain mitigator capsules known, the capsule according to the invention can be fixed in the body of the threaded mitigator; but the fixation can be done quickly and simple performing better on the contour of envelope 1, two diametrically opposite parallel planes 14, near the end of its internal channel where adjusting screw 9 ends and, face to face, in the body of the mitigator, a groove 15 of roughly flat walls that pass through only one side, allowing the insertion of a flat clip 16; this staple flat will be similar to a circular shutter spring, but presenting substantially rectilinear branches 17 that extend parallel to one side and another of the envelope in front of the planes; in order that the clip 16 cannot detach spontaneously, the branches 17 may have, in the area of their free end, some front-to-front projections; as an alternative, detachment of the flat clip can be prevented by the presence of a screw (not shown) inserted in a grounded hole in the body and in support against the flat clip; the clip 16 can also present a tongue 19 that extends between its branches in the same address and equidistant from them, and the wrap 1 can have a groove 20 on its outer surface longitudinal to the free end of the envelope and equidistant of the planes 14, for the accommodation of this tongue 19; the tongue length is then slightly shorter than the groove depth, such that the clip can be removed housing under the tongue, from the outside of the body of the mitigator, the end of a screwdriver tip by means of the which will lift the tongue resting on the bottom of the groove.
The capsule assembly in the body of the mitigator and its disassembly are then quickly and remarkably simplified

Claims (10)

1. Thermostatic mitigator capsule, comprising a hollow outer shell (1) having one or more openings (11) that constitute a first inlet for a first fluid stream, as well as one or more openings (12) that constitute a second inlet for a second fluid stream and crossed by an internal channel that flows through an orifice that constitutes an outlet for a mitigated fluid resulting from the mixing of the fluid streams, a thermostatic dilatable element (4), two seats (21, 13 ) of a flapper valve each next to an inlet, a cursor (3) that has two flapper valves (35, 36) each cooperating with one of the seats to isolate or to communicate each input and output, fixed to a part (41) of the mobile thermostatic element depending on its temperature, a plunger (5) in which an area of the thermostatic element is housed which, in a given regulation, is fixed while the seat ( 21) Immediately of the first inlet is not in contact with its valve (35), and an elastic organ (7) requesting the piston, in the sense of approaching this valve with respect to its seat, capsule characterized in that the piston (5 ) has at least one area guided by sliding by means (52, 8, 63) of reversible releasable guide, adapted to guide it while the seat (21) immediately at the first inlet is not in contact with its valve (35) , remove the guide when the valve rests on the seat to allow misalignment of the piston (5), thermostatic element (4) and cursor (3), so that the flap valve (35) is applied tightly against this seat (21), and reset the guide when the valve leaves its seat.
2. Thermostatic capsule according to claim 1, characterized in that an area of the thermostatic element is surrounded by a turbulence creating element (10).
3. Thermostatic capsule according to claim 2, characterized in that the turbulence creating member is a ring (10) disposed in the outlet area for the mitigated fluid, which has a through passage (101) that leaves a space in a general way annular between the inner surface of its wall and the thermostatic element, this passage presenting a flare (102) towards the outside of the capsule, extending grooves (103) longitudinally and there is a cavity (104) at its end turned towards the inside of the capsule.
4. Thermostatic capsule according to claim 1, characterized in that the cursor (3) comprises two concentric rings (31, 32) joined together and has steps (33) between these two rings, the outer ring (31) comprises the two valves of flap (35, 36), which extend annularly, the seats (21, 13) for the valves extend annularly to one side and another of the cursor, and the inner ring (32) is fixed around the thermostatic element (4 ).
5. Thermostatic capsule according to claim 1, characterized in that the reversibly releasable guide means comprise an end zone (52) of the plunger (5) that penetrates a hole drilled in a partition (63) extending transversely to the longitudinal geometric axis of the casing (1), a guide washer (8) encased around this end zone, and a seat provided for the guide washer in the partition.
6. Thermostatic capsule according to claim 5, characterized in that the partition wall seat (63) for the washer (8) as well as this one has a truncated conical shape, and the end of the area (47) of the thermostatic element (4) that is housed in the plunger (5) it has a domed shape while the bottom (53) of the area of the plunger that rests against this end of the thermostatic element has a rounded shape.
7. Thermostatic capsule according to claim 1, characterized in that it comprises a sleeve (2) fixed on the envelope (1) and provided with the seat (21) immediately at the first inlet (11), while the envelope comprises the seat (13) immediately to the second inlet (12), as well as another sleeve (6) mounted in sliding arrangement in the inner channel of the envelope, this other sleeve comprising a chamber (61) for the plunger (5) and a spring (7) of traction for this piston, and a chamber (62) separated from the previous one by a transverse partition (63) and having an internal thread designed to cooperate with an external thread of a temperature regulating screw (9).
8. Thermostatic capsule according to claim 1, characterized in that the thermostatic element (4) comprises a container (44) for a mass of dilatable matter, which has planes (48), or depressions (48 ') and reliefs, which determine, in cross-section, a shape that has at least two lobes (49).
9. Thermostatic capsule according to claim 1, adapted to be housed in a mitigator body, characterized in that the envelope contour (1) has two planes (14), adapted to cooperate with a fixing member (16) inserted in by At least one mitigator body opening.
10. Thermostatic capsule according to claim 9, characterized in that the envelope contour (1) has two planes (14), and the mitigator comprises a body having a groove, into which a clip (16) is inserted, which has branches (17) substantially rectilinear, which extend to one side and the other of the envelope in front of these planes, the contour of the envelope also presenting a groove that allows the insertion of a staple removal tool.
ES99400240T 1998-02-11 1999-02-03 Safety cartridge for thermostatic mitigator. Expired - Lifetime ES2205716T3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9801639 1998-02-11
FR9801639A FR2774740B1 (en) 1998-02-11 1998-02-11 Safety cartridge for thermostatic mixer

Publications (1)

Publication Number Publication Date
ES2205716T3 true ES2205716T3 (en) 2004-05-01

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ID=9522862

Family Applications (1)

Application Number Title Priority Date Filing Date
ES99400240T Expired - Lifetime ES2205716T3 (en) 1998-02-11 1999-02-03 Safety cartridge for thermostatic mitigator.

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US (1) US6085984A (en)
EP (1) EP0936524B1 (en)
DE (1) DE69910092T2 (en)
ES (1) ES2205716T3 (en)
FR (1) FR2774740B1 (en)

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Also Published As

Publication number Publication date
EP0936524B1 (en) 2003-08-06
US6085984A (en) 2000-07-11
DE69910092T2 (en) 2004-02-26
FR2774740B1 (en) 2000-05-05
FR2774740A1 (en) 1999-08-13
DE69910092D1 (en) 2003-09-11
EP0936524A1 (en) 1999-08-18

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